Preparation and Characterization of High-Voltage Cathode Material LiNi_0.5Mn_1.5O₄ for Lithium Ion Batteries

Abstract:

High energy density and rechargeable lithium ion batteries are attracting widely interest in renewable energy fields. The preparation of the high performance materials for electrodes has been regarded as the most challenging and innovative aspect. By utilizing a facile combustion synthesis method, pure nanostructure LiNi_0.5Mn_1.5O₄ cathode material for lithium ion batteries were successfully fabricated. The crystal phase of the samples were characterized by X-Ray Diffraction, and micro-morphology as well as electrochemistry properties were also evaluated using FE-SEM, electrochemical charge-discharge test. The result shows the fabricated LiNi_0.5Mn_1.5O₄ cathode materials had outstanding crystallinity and near-spherical morphologies. That obtained LiNi_0.5Mn_1.5O₄ samples delivered an initial discharge capacity of 137.2 mAhg^-1 at the 0.1 C together with excellent cycling stability and rate capability as positive electrodes in a lithium cell. The superior electrochemical performance of the as-prepared samples are owing to nanostructure particles possessing the shorter diffusion path for Li⁺ transport, and the nanostructure lead to large contact area to effectively improve the charge/discharge properties and the rate property. It is demonstrated that the as-prepared nanostructure LiNi_0.5Mn_1.5O₄ samples have potential as cathode materials of lithium-ion battery for future new energy vehicles.

• Periodical: Materials Science Forum (Volume 953)
• Pages: 121-126
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.953.121
• Online since: May 2019
• Authors: Zhe Chen*, Quan Fang Chen, Sha Ne Zhang, Guo Dong Xu, Mao You Lin, Miao Miao Wang, Shen Zhi, Yong Sheng Chen, Jing Zou, Shi Wen Xing
• Keywords: Cathode Material, Electrochemical Properties, Lithium Ion Battery, Nanostructure

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